[XTENSA] adjust boot linker script start addresses

Move boot-redboot load address from 0xD0200000 to 0xD1000000
to make space for larger kernel images, in particular those with
an embedded initramfs filesystem.
Also properly set the ELF start address in boot-elf images so
that PC need not be set manually when loading them using GDB.

Signed-off-by: Marc Gauthier <marc@tensilica.com>
diff --git a/arch/xtensa/boot/boot-elf/boot.ld b/arch/xtensa/boot/boot-elf/boot.ld
index 4ab06a0..e33855c 100644
--- a/arch/xtensa/boot/boot-elf/boot.ld
+++ b/arch/xtensa/boot/boot-elf/boot.ld
@@ -1,4 +1,5 @@
 OUTPUT_ARCH(xtensa)
+ENTRY(_ResetVector)
 
 SECTIONS
 {
diff --git a/arch/xtensa/boot/boot-redboot/boot.ld b/arch/xtensa/boot/boot-redboot/boot.ld
index 65b7264..774db20 100644
--- a/arch/xtensa/boot/boot-redboot/boot.ld
+++ b/arch/xtensa/boot/boot-redboot/boot.ld
@@ -2,7 +2,7 @@
 
 SECTIONS
 {
-	.start 0xD0200000 : { *(.start) }
+	.start 0xD1000000 : { *(.start) }
 
 	.text :
 	{